document issue for kmstool-enclave-cli

[forhead]

hi
when I test the kmstool-enclave-cli, I found an issue for the README.md document, below is the link
https://github.com/aws/aws-nitro-enclaves-sdk-c/tree/main/bin/kmstool-enclave-cli

• issue 1:

the api call example for genkey parameter is for the decrypt

proc = subprocess.Popen(
    [
        "/kmstool_enclave_cli",
        "genkey",
        "--region", "us-east-1",
        "--proxy-port", "8000",
        "--aws-access-key-id", access_key_id,
        "--aws-secret-access-key", secret_access_key,
        "--aws-session-token", token,
        "--ciphertext", ciphertext,
    ],
    stdout=subprocess.PIPE
)

result_b64 = proc.communicate()[0].decode()
plaintext_b64 = result_b64.split(":")[1].strip()

• issue 2
  the genkey call doc says that and outputs the base64-encoded plaintext with PLAINTEXT: as prefix if the execution succeeds.
  but with my test, I get below output, it seems not clearly document for the output, can you help to clarify it?

b'CIPHERTEXT:long cipher text\nPLAINTEXT: short plain text\n'